Metal roofing
Architectural shingles
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across San Gabriel
Roof replacement in San Gabriel costs between $9,800 and $22,000 for a typical single-family home, depending on square footage, material, and whether the decking underneath needs to be replaced. Most full tear-offs here take two to five days once materials arrive. Call Orange County Roofing Co at (866) 942-4187 for a free, line-item estimate written specifically for your San Gabriel home – we’ll walk the roof with you and explain exactly what we’re seeing before you commit to anything.
We know San Gabriel’s housing stock well, from the compact bungalows in the 91775 ZIP to the 1950s tract homes spreading through 91776 and the newer infill construction in 91778. That matters because the age and framing style of your roof changes what a replacement actually involves once we tear off the old material. We’ve built our process around catching those issues before they become change orders.
Why Orange County Roofing Co Is San Gabriel’s Preferred Roof Replacement Company
Kurt Hensley has built our roofing team around one principle: tell the homeowner what the roof actually needs, not what pads the invoice. In San Gabriel, that means clear explanations about skip-sheathing on older bungalows, UV-degraded underlayment on sun-exposed slopes, and flashing details where additions meet original framing. We source from seven major manufacturers – GAF, CertainTeed in San Gabriel, Owens Corning, IKO, Atlas, Tamko, and Boral – so the conversation is about which material fits your home, not which brand we happen to carry.
Our San Gabriel customers typically wait three to seven days from signed contract to first day of tear-off, depending on permit turnaround. We inspect every roof before quoting. Not a drive-by glance. A full walk with photos, decking probe where accessible, and a written condition report. That report is yours whether you hire us or not. When we tell you the deck needs replacing, you’ll see exactly why in the photos we show you.
We’re a full-lifecycle roofing company, which means the team that inspected your roof is the same team that replaces it. No subcontractors handed off from a sales office. No mystery crew showing up on day one. The people you meet at the estimate are the people swinging hammers on your San Gabriel home.
Styles & brands we work with
Flat Roof Replacement in San Gabriel
Flat roof replacement in San Gabriel runs $11,500 to $24,000 for most residential applications, with costs driven by the roof’s surface area, the existing membrane system, and whether parapet walls or scuppers need rebuilding. We see flat roofs most often on San Gabriel’s mid-century homes, additions tacked onto older bungalows, and detached garages and ADUs. The semi-arid heat here bakes flat roof membranes year-round, and the failure point is almost always at seams and penetrations where the membrane pulls away under repeated expansion and contraction cycles.
When San Gabriel Homeowners Should Replace Rather Than Patch
If your flat roof has more than three active leaks, visible membrane cracking, or ponding water that sits for more than 48 hours after rain, patching is throwing money away. We tell San Gabriel homeowners this directly. A patch on a failing membrane just moves the leak somewhere else within a season or two.
Materials We Recommend for San Gabriel Flat Roofs
For San Gabriel’s heat load, we typically quote TPO and PVC systems for residential flat roofs. Both handle UV exposure well, and the heat-welded seams outperform older torch-down systems. We also carry manufacturer-backed warranty options through our brand partners, so you choose the coverage level that fits how long you plan to stay in the home. No brand is pushed on you. We show the numbers and let the roof’s geometry and your timeline decide.
Roof Installation in San Gabriel
Roof installation in San Gabriel for new construction or additions runs $12,000 to $28,000 for most projects, with final pricing tied to roof pitch, complexity of the framing, and material selection. Whether you’re building a detached ADU in the 91776 ZIP or adding a second story to a 1920s bungalow in 91775, the roof is not the place to cut corners. San Gabriel’s building department requires permits for new roof installations, and we pull those permits ourselves and schedule the inspections. No homeowner wants to chase paperwork on a project this size.
New Construction and Detached ADUs
San Gabriel’s ADU boom means a lot of homeowners are adding small dwellings to lots that originally held a single bungalow. We install roofs on detached ADUs, garages, workshops, and full new builds. For these projects, we coordinate with your general contractor or work directly with you if you’re self-managing. The roof framing inspection happens before we install anything – we make sure that step is scheduled and passed before materials go on.
Re-Roofing an Existing Structure
If your San Gabriel home is getting a second roof layer removed and replaced, we handle the full Roof Replacement scope: tear-off, deck inspection, any required sheathing repair, underlayment, flashing, and shingle or membrane installation. The permit path for re-roofing is simpler than new construction, but county inspections still apply. We’re on site for the inspection and we don’t leave until it passes.
Trusted Brands We Service in San Gabriel
We install Owens Corning, IKO, and Atlas shingle systems alongside our other manufacturer lines, which means we can give San Gabriel homeowners a real comparison between warranty tiers, material weights, and price points. Carrying multiple competing brands keeps us honest. We don’t have a quota to hit with any single manufacturer, so our recommendation is based on your roof’s pitch, your home’s exposure, and your budget. All of these brands offer manufacturer-backed warranties, and we’ll walk you through the coverage differences before you sign anything.
Common Roof Replacement Problems We See in San Gabriel Homes
- Skip-sheathing under original wood shake. San Gabriel’s 1920s and 1930s bungalows often have gap-spaced skip-sheathing under the old wood shake. Once we strip the shake, the gaps mean there’s nothing solid for new shingles to nail into. The roof needs a full plywood or OSB deck overlay before the new roof goes on. This is the single biggest source of unanticipated cost on older San Gabriel homes.
- UV-brittle underlayment. Decades of San Gabriel Valley sun bakes roof underlayment until it cracks and loses its water-shedding ability. We see this on homes where the original roof lasted far longer than it should have. Once the underlayment is brittle, any exposed decking beneath it is at risk of dry rot or water damage.
- Failed flashing at penetrations. Older San Gabriel homes have accumulated satellite dishes, vent pipes, swamp cooler mounts, and addition tie-ins over the years. Each penetration is a leak waiting to happen, especially where flashing was never properly integrated. During a replacement, we re-flash every penetration with new metal and proper sealing details.
- Wood shake decay hidden from the street. A wood shake roof can look acceptable from the curb while the underside is dry-rotted where shake layers overlap. The decay hides until rain soaks through or a tear-off exposes it. We probe roofs during inspection, but the full extent of this damage often only becomes clear once the old roof is off.
See the difference
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AfterPricing for Roof Replacement in San Gabriel, CA
You should expect these ranges for a full tear-off and replacement in San Gabriel:
- Asphalt shingle roof on a standard ranch or bungalow: $9,800 to $16,500
- Architectural shingle replacement with some decking work: $13,000 to $19,500
- Full roof with extensive deck replacement: $15,000 to $22,000
- Flat roof replacement on a mid-century home or garage: $11,500 to $24,000
- New construction roof installation (ADU, addition, or full build): $12,000 to $28,000
What moves your price: roof size and pitch, whether skip-sheathing or rotted deck must be replaced, the number of penetrations needing new flashing, and the material you choose. We give you a written, line-item quote before work starts so you see exactly where every dollar goes. Call (866) 942-4187 to schedule a free estimate – the walk-through takes about an hour and you’ll have the numbers in hand.
We Also Serve Cities Near San Gabriel
Orange County Roofing Co serves San Gabriel and the surrounding San Gabriel Valley communities, including East San Gabriel, San Marino, Alhambra, and Rosemead. If you’re in San Gabriel or a neighboring city, we’ll come out, inspect your roof, and give you a straight answer about what it needs and what it costs. No obligation, no pressure, just a clear scope of work you can use to compare quotes.
Serving San Gabriel, CA — Our Local Coverage Area
We’re based in the San Gabriel area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About Roof Replacement in San Gabriel
We determine deck replacement during the tear-off, when we can see the actual condition of the sheathing underneath. On older San Gabriel homes, especially 1920s and 1930s bungalows with skip-sheathing, the deck frequently cannot support new shingles and must be overlaid with plywood or OSB. We also probe for dry rot during inspection so you get early warning if deck replacement is likely. The final call happens once the old roof is stripped, and we show you photos of what we found before proceeding. Call (866) 942-4187 for an inspection if you suspect deck damage on your San Gabriel roof.
Architectural asphalt shingles with high solar reflectance ratings perform best for San Gabriel’s semi-arid heat, particularly Owens Corning, IKO, and Atlas products with manufacturer-rated UV resistance. For flat roof sections, TPO and PVC membranes handle the thermal cycling better than older torch-down systems. We recommend materials based on your specific roof’s orientation and pitch – a south-facing slope in San Gabriel takes far more UV abuse than a shaded north slope. Call (866) 942-4187 and we’ll walk you through the material options that fit your home.
Older San Gabriel homes, particularly the pre-1940 bungalows and 1950s tract homes, often require the same re-roofing permit as newer construction, but the condition of the existing framing and decking can trigger additional scrutiny from the county inspector. We handle permit applications and inspection scheduling for every Roof Replacement job. If your home has original skip-sheathing or evidence of past structural repairs, we flag that for the inspector up front to keep the process moving. A smooth permit path starts with a contractor who knows what the county expects. Call (866) 942-4187 to discuss your home’s situation.
Yes, we regularly replace roofs on detached ADUs, garages, workshops, and outbuildings throughout San Gabriel, including the 91775, 91776, and 91778 ZIPs. These projects are usually smaller and less expensive than main-house roofs, but they still require the same permit and inspection process if the structure is over 120 square feet. We handle the permit for you. If you have a detached structure that’s leaking or showing signs of wear, call (866) 942-4187 for a free estimate – we’ll inspect it alongside your main roof.
A well-installed architectural shingle roof in San Gabriel typically lasts 22 to 28 years, while flat roofs with TPO or PVC membrane last 15 to 25 years depending on UV exposure and maintenance. The semi-arid climate here ages underlayment faster than shingles, so a roof that still looks acceptable from the street may have failing underlayment underneath. We recommend a professional inspection every three to five years in San Gabriel to catch underlayment and flashing issues before they become leaks. Call (866) 942-4187 to schedule an inspection.
Contact Orange County Roofing Co for Your San Gabriel Roof Replacement
If your San Gabriel roof is approaching the end of its life, or if you’ve spotted leaks, cracked shingles, or sagging decking, call (866) 942-4187 today. We’ll schedule a free inspection, walk the roof with you, and give you a written estimate that tells you exactly what your roof needs and what it costs. No pressure, no vague promises, no inflated scope. Just a straight answer from a team that knows San Gabriel’s homes and San Gabriel’s climate. Kurt Hensley and the whole Orange County Roofing Co crew are ready when you are.
Written by Kurt Hensley, Owner at Orange County Roofing Co, serving San Gabriel and the San Gabriel Valley since our founding.